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LoeAT1NG TROUBLES AND RUNNING IRREGULARITIES
Carry out following checks when the engine does not start easily or runs irregularly.
Locati ng the trouble
I
R.emedies
Loc.ting the t r o u b l e !
Remedies
1 - - - - - - - - - . - - - -
1
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4 .• Clulch trouble•.
DIFFICULT
STARTING
INCORRECT
RUNNING
1. - Lock of power.
Tur
to
c:
reserve
:l.
Refill as
~oon
as
po,sible.
I
See
page
7.
i
Replace.
replace.
iighten.
Adjust
(see
Fig.
16).
Wash
with
gasoline
or
Replace.
Replace.
Clean with pure gasoline and blow
dry.
Replace
the seleclor.
Replace the pinion.
Replace.
See No.
2
of this paragraph.
Adjust.
Dismount and clean carburettor in
gasoline and compressed air.
For type and diameter of jets and
vents, see
page 5.
Re - time:
Lubricate or, if necessary. replace.
Slacken.
Should the control
have
excessive
play
in
neutral, tension control
cables by screwing back the re-
spective adjuster screw (on cable
sheath end, ratchet quadrant side)
with
an
8
mm.
open
ended
wrench. tf the cable tension in
neutral
is correct but
the
re'e·
rence
marks
of
the
handlebars
do not tally, tighten one of the
adjuster ,crew, and unscrew the
ocher one to the same extent, so
that the cable tension is not ai-
lered.
Replace
Adjust.
Replace.
Replace
both
plates
and
spring'.
Adjust
(see
f,g.
17).
Te') up oil level. Tighten the screw
on
draining
hole.
6.
High
fuel
consumption.
I
Fuel level too high in carbu-
rettor:
Float
perforated.
II
Air cleaner chocked or dirty.
Inner cables rusted.
Excessive play.
8 .• Steering column become• •tiff.
Top race of top bearing loose.
III - Jets or vents of the carburet-
tor blocked or - dirty; incorrect
or increased diameter.
7.• Control. not operating properly,
9 .• Exce..
in
ploy of _ring
c0-
lumn.
Spring of stirrup broken, feeble or
missing.
Selector
arms
chamfered.
Dogs of gear pinions chipped
or
worn.
IV - Retarded
ignition.
V - Poor
compression.
Gear chanoe control cables out of
adjustm;nt.
10 .•
Poor
braking.
Stroke of pedal or lever too long.
Brake linings oily or worn down
Brake drums and lininit' SCrlltcned.
Top race of lop ball bearing too
light.
Bottom races of the two bearings
pitted.
5. - Gear pinion. di.engage of own
.ccord.
a) Clutch
snotches:
Gear pinions not lubricated pro·
perly.
b) Clutch
slips:
Springs
feeble.
Plates worn or burnt.
c} Clutch does not disengage com-
pletely:
Excessive play on control cable.
mm.
gap
to
0.6
Replace.
Tighten.
See
paragraph
• Difficult starting»
No.1.
Replace or clean the plug and cor·
rect the gap to 0.6 mm (.023'·).
Clean.
a) Fit on a proper type of sparkplug.
b) Re - time
the
ignition.
Clean the ring, and grooves.
Tighten
(box wrench).
Set the head properly and tighten
the nuts.
Replace.
Clean (see page
10).
Decarbonize cylinder, piston and cy-
linder
head.
Clean.
Correct
(0.023" ).
: Replace the plug.
Clean with suitable flies or very fine
emery
paper.
Correct (-see fig.
18).
!
: Replace.
I
I
Re - time
ignition.
,
, Remove and wash in gasoline - Blow
dry.
Clean (see page
10).
i
Release.
i
!
I
Disconnect the plug lead. Check if
I
sparking occurs between lead and
crankase when the kickstarter is
!
operated.
!
Clogged,
dirty
Cylinder ba,e gasket not sealing
2.
Poor
compression.
I
Soarkplug not well screwed down \
in cylinder
head.
Cylinder head not fitting properly
into the spigot on top
0'
cylinder
I
Piston
rings
gu
med
up.
I
3 .• Explosions at muffler or carbu-
rettor.
!
Sparking plug carbon-coated or with
i
excessive electrode gap.
I
Carbon pearl, on sparkplug insula-,'
tion.
Pre - ignition.
i
iip of contact breaker loose.
Condenser screw loose.
Not enoug'
mixture flowing to
carburettor.
Muffler outlet pipe carbonized
:xhaust pOr! partially closed by car·
bo
oeposit.
Breaker points completely worn or
pitted
3 . . Ignition
Timing
wrong.
Porcelain
0
sparkplug cracked
Breaker points dirty, partially worn
or pitted.
Gap between breaker points incor·
rect.
Engine flooding
Float perforated
Air cleaner cho ed or
dirty
Starter
va Ive
'tick ing
Sparkplug
dirty
Filter on carburettor
Fuel
tap body
Carbo et or
bedy
Main jet
Atomizer
Packing of fuel tap
2. - Carcuntion
1.
Fuel system.
~
ue I tan
empty.
-
13-
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